Right, I was not trying to make an absolute "type systems are bad" statement. Just pointing out that the analogy can be used to cut both ways. :)

Indeed, I think the analogy has pretty good legs. Consider, if you are working with cast iron, molds are the way to go.

Your hands are your mind... you think the types, check the types, and erase them, but do all of it briefly, while playing with that part, and then move away.

Compiled languages are like building a bunch of plaster mold, and then just doing the castle in one step.

Optional typing, or using Any types and casting, is like using molds for a nice foundation, and using your hands to add little bits on top.